How do I...configure my c# app to be compatible with framework 3 and 3.5

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Hi

I please need help configuring my newly created C# Windows Forms App that was created with Visual Studio 2014 to be compatible with framework 3.5 and below to work on older operating systems like Windows XP. How do I do that? Please help me.

Thank you!

:)

Posted 31-Aug-14 22:05pm

Armand Peens

Updated 31-Aug-14 22:07pm

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OriginalGriff · Accepted Answer · 2014-08-31T22:31:00

Solution 1

Open your project in the Solution Explorer, and double click the "Properties" branch.
In the page that appears, Select the "Application" tab from the right hand side.
Change the "Target framework" to 3.5 or below.
Save the page, and rebuild your project.

Posted 31-Aug-14 22:31pm

OriginalGriff

Kornfeld Eliyahu Peter · Accepted Answer · 2014-08-31T22:31:00

Compatibility of an application with a specific framework is not a configuration issue, but what you have used in your application.
If you used new features from framework 4 or 4.5 there is no way to run it on framework 3 or 3.5...and not matter what you are writing in the configuration file...
If you want to create an application for older frameworks change target framework option of your project in Visual Studio...

Neetin_1809 · Accepted Answer · 2014-08-31T22:53:00

Solution 3

Hello @Armand Peens,
I have faced this type of problem.So To avoid this ,try to bring it to the lowest version as far as possible.
To Changed the compile Target Framework ,Go To Solution explorer:-1)Right Click On Project
2)Go To Properties
3)Select Application Tab
4)Change Target Framework to 2.0

If You are Choosing Target Framework 4.0 or above Then it will not work in windows xp at all. For these you have to install windows Xp service 3.

I have tried to change it to Framework 2.0 and then build it & Installed Dot Net Framework 2.0 in windows XP & Finally working very well.

Hope It Helps You

Posted 31-Aug-14 22:53pm

Neetin_1809

Comments

DineshMaind 1-Sep-14 4:54am

This is better solution than previous solutions suggested.

Kornfeld Eliyahu Peter 1-Sep-14 5:02am

How that? OG and me suggested exactly the same thing - change Target Framework?

Neetin_1809 1-Sep-14 5:16am

Of course Sir OG Sir gave very good clarification but this solution gave more detailed compatibility with XP2 and XP3. I already gave my +5 to OG and this too.

Kornfeld Eliyahu Peter 1-Sep-14 5:22am

I see your point, but the problem is that the version-OS comparison is far to be accurate, so for that matter it is the worst solution...
See yourself: http://msdn.microsoft.com/en-us/library/8z6watww(v=vs.100).aspx

DineshMaind 1-Sep-14 5:33am

Thanks @Kornfeld Eliyahu Sir for more detailed information.

Armand Peens · Accepted Answer · 2014-08-31T23:24:00

Thanks guys I did that but then I got errors. Microsoft says I must add the following code to the App.Config file but it also doesn't work:

Add the <supportedRuntime> element as follows to the application configuration file:

<configuration>
<startup>
<supportedRuntime version="<version>"/>
</startup>
</configuration>

I did that but it also didn't work.

Please help!

Thank you!

:)

How do I...configure my c# app to be compatible with framework 3 and 3.5

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